<script>
export default {
  name: 'RouteView',
  props: {
    keepAlive: {
      type: Boolean,
      default: false
    }
  },
  data () {
    return {}
  },
  computed: {
    key () {
      return this.$route.path
    }
  },
  render () {
    const { $route: { meta }, $store: { getters } } = this
    const inKeep = (
      <keep-alive>
        <router-view class="page-fade-in" />
      </keep-alive>
    )
    const notKeep = (
      <router-view />
    )
    // 这里增加了 multiTab 的判断，当开启了 multiTab 时
    // 应当全部组件皆缓存，否则会导致切换页面后页面还原成原始状态
    // 若确实不需要，可改为 return meta.keepAlive ? inKeep : notKeep
    if (!getters.multiTab && !meta.keepAlive) {
      return notKeep
    }
    return this.keepAlive || getters.multiTab || meta.keepAlive ? inKeep : notKeep
  }
}
</script>
<style lang="less" scoped>
  @keyframes fadeInUp {
    0% {
      opacity: 0;
      -webkit-transform: translate3d(0, 20px, 0);
      transform: translate3d(0, 20px, 0);
    }

    to {
      opacity: 1;
      -webkit-transform: none;
      transform: none;
    }
  }
  .page-fade-in {
    animation-duration: 400ms;
    animation-fill-mode: both;
    animation-name: fadeInUp;
  }
</style>
